Cisco Catalyst 2960-XR Configuration Guide

Enabling BPDU Guard 92
Enabling BPDU Filtering 93
Enabling UplinkFast for Use with Redundant Links 95
Disabling UplinkFast 96
Enabling BackboneFast 97
Enabling EtherChannel Guard 98
Enabling Root Guard 99
Enabling Loop Guard 100
Monitoring the Spanning-Tree Status 102
Additional References for Optional Spanning Tree Features 102
Feature Information for Optional Spanning-Tree Features 103
CHAPTER 5 Configuring EtherChannels 105
Finding Feature Information 105
Restrictions for EtherChannels 105
Information About EtherChannels 106
EtherChannel Overview 106
EtherChannel Modes 107
EtherChannel on Switches 108
EtherChannel Link Failover 109
Channel Groups and Port-Channel Interfaces 109
Port Aggregation Protocol 111
PAgP Modes 111
Silent Mode 112
PAgP Learn Method and Priority 112
PAgP Interaction with Virtual Switches and Dual-Active Detection 113
PAgP Interaction with Other Features 114
Link Aggregation Control Protocol 114
LACP Modes 114
LACP Interaction with Other Features 115
EtherChannel On Mode 115
Load-Balancing and Forwarding Methods 115
MAC Address Forwarding 116
IP Address Forwarding 116
Load-Balancing Advantages 117
Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
OL-29424-01 vii
Contents

Cisco Catalyst 2960-XR Specifications

General

Stacking Bandwidth	80 Gbps
Layer Support	Layer 2 and Layer 3
Jumbo Frame Support	9198 bytes
RAM	512 MB
Input Voltage	100-240V AC
Model	Catalyst 2960-XR
Uplink Interfaces	4 x 1G SFP or 2 x 10G SFP+
Downlink Interfaces	24 or 48 x Gigabit Ethernet ports
Power Supply	Internal
MAC Address Table Size	16, 000 entries
PoE	Available on PoE models
Weight	4.5 kg
Features	energy efficiency
Stacking	Up to 8 switches
Operating Temperature	0 to 45°C